Note : Les descriptions sont présentées dans la langue officielle dans laquelle elles ont été soumises.
81802134
SYNERGISTIC FUNGICIDAL MIXTURES FOR FUNGAL CONTROL IN CEREALS
Cross Reference to Related Applications
[0001] This application claims the benefit of U.S. Provisional Patent
Application Serial
No. 62/035198 filed August 8, 2014.
Field
[0002] This disclosure concerns a synergistic fungicidal composition
containing (a) a
compound of Formula I, (3S,6S,7R,8R)-8-benzy1-3-(3-((isobutyryloxy)methoxy)-4-
methoxypicolinamido)-6-methy1-4,9-dioxo-1,5-dioxonan-7-ylisobutyrate, and (b)
at least
one ergosterol biosynthesis-inhibitor fungicide selected from the group
consisting of
prothioconazole, epoxiconazole, cyproconazole, myclobutanil, prochloraz,
metconazole,
difenconazole, tebuconazole, tetraconazole, fenbuconazole, propiconazole,
fluquinconazole,
flusilazole, flutriafol, and fenpropimorph.
Background
[0003] Fungicides are compounds, of natural or synthetic origin, which act to
protect
plants against damage caused by fungi. Current methods of agriculture rely
heavily on the use
of fungicides. In fact, some crops cannot be grown usefully without the use of
fungicides.
Using fungicides allows a grower to increase the yield and the quality of the
crop, and
consequently, increase the value of the crop. In most situations, the increase
in value of the
crop is worth at least three times the cost of the use of the fungicide.
[0004] However, no one fungicide is useful in all situations and repeated
usage of a
single fungicide frequently leads to the development of resistance to that and
related
fungicides. Consequently, research is being conducted to produce fungicides
and
combinations of fungicides that are safer, that have better performance, that
require lower
dosages, that are easier to use, and that cost less.
[0005] Synergism occurs when the effect of two or more compounds exceeds the
effect of the compounds when used alone.
Summary
[0006] It is an object of this disclosure to provide synergistic compositions
comprising fungicidal compounds. It is a further object of this disclosure to
provide processes
Date recue / Date received 2021-12-17
81802134
that use these synergistic compositions. The synergistic compositions are
capable of preventing or
curing, or both, diseases caused by fungi of the classes Ascomycetes and
Basidiomycetes. Ti
addition, the synergistic compositions are capable of providing improved
growth in crops, wherein
the growth improvement is characterized by at least one of the effects
selected from the group
consisting of preventing or curing pathogenic fungi and improving plant
physiology, wherein
improved plant physiology is characterized by at least one of the effects
selected from the group
consisting of enhanced root growth, improved greening, improved water use and
efficiency,
improved nitrogen use efficiency, delayed senescence, and enhanced yield. In
accordance with this
disclosure, synergistic compositions are provided along with methods for their
use.
[0006a1 In certain embodiments, the present disclosure concerns:
- a synergistic composition for providing improved growth in crops comprising
a
synergistic mixture comprising a fungicidally effective amount of a compound
of Formula
H3c
CH
0 cH3
(0
0 CH3 CH3
H3C-0 0 "C)
0
/
N 0 0,
Formula 1
and prothioconazole, wherein the weight ratio of the compound of Formula Ito
prothioconazole is from 100:195 to 130:195, and a phytologically acceptable
carrier
material, wherein improved growth in crops is characterized by at least one of
the effects
selected from the group consisting of preventing or curing a disease caused by
the
pathogenic fungi Rhynchosporium secalis (RHYNSE), the causal agent of leaf
blotch of
barley, and improving plant physiology, wherein improved plant physiology is
characterized by at least one of the effects selected from the group
consisting of improved
greening and enhanced yield, wherein the composition is a wettable powder, an
emulsifiable concentrate comprising the components of the synergistic
composition
dissolved in a mixture of water-immiscible solvents and emulsifiers, an
aqueous
suspension, a granular formulation or a dust;
- use of a synergistic composition for providing improved growth in crops,
wherein
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81802134
the composition comprises a synergistic mixture comprising a fungicidally
effective
amount of a compound of Formula I:
H3c
¨cH3
0 cH3
cH3 cH3
H3c-o 0 tO
0
N 0
Formula I 2
and prothioconazole, wherein the weight ratio of the compound of Fonnula Ito
prothioconazole is from 100:195 to 130:195, and a phytologically acceptable
carrier
material, wherein improved growth in crops is characterized by at least one of
the effects
selected from the group consisting of preventing or curing a disease caused by
the
pathogenic fungi Rhynchosporiurn secalis (RHYNSE), the causal agent of leaf
blotch of
barley, and improving plant physiology, wherein improved plant physiology is
characterized by at least one of the effects selected from the group
consisting of improved
greening and enhanced yield; and
- a method for improving growth in crops, the method comprising: applying a
fungicidally effective amount of a synergistic mixture comprising a compound
of Formula
H3c
cH3
o=ç cH3
0
o cH3
H3c-0 0
HN..., t)CI
N 0 0
Formula 1
and prothioconazole, wherein said effective amount is applied to at least one
of a plant, an
area adjacent to a plant, soil adapted to support growth of a plant, a root of
a plant, and
foliage of a plant, wherein the weight ratio of the compound of Formula Ito
2a
Date Regue/Date Received 2022-07-15
81802134
prothioconazole is from 100:195 to 130:195, wherein the synergistic mixture is
effective
against leaf blotch of barley caused by the pathogenic fungi is Rhynchosporium
secalis.
Detailed Description
[0007] The present disclosure concerns a synergistic fungicidal mixture
comprising an
fungicidally effective amount of (a) a compound of Formula I, (3S,6SR,8R)-8-
benzy1-3-(3-
((isobutyryloxy)methoxy)-4-methoxypicolinamido)-6-methy1-4,9-dioxo-1,5-
dioxonan-7-y1
isobutyrate, and (b) at least one ergosterol biosynthesis-inhibitor fungicide
selected from the group
consisting of prothioconazole, epoxiconazole, cyproconazole, myclobutanil,
prochloraz,
metconazole, difenconazole, tebuconazole, tetraconazole, fenbuconazole,
propiconazole,
fluquinconazole, flusilazole, flutriafol, and fenpropimorph.
H3c
--CH3
0
CH3
(0
0 CH03 CH3
H3C-0 0 0
_ Fi/N ....
\ /
0N 0 0
0
Formula!
[0008] As used herein, prothioconazole is the common name 2-[(2RS)-2-(1-
chlorocyclopropy1)-3-(2-chloropheny1)-2-hydroxypropyl]-2H-1,2,4-triazole-3(4H)-
thione and
possesses the following structure:
2b
Date Regue/Date Received 2022-07-15
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II N
CI I / NH
OH
CI
[0009] Its fungicidal activity is described in The Pesticide Manual, Fifteenth
Edition,
2009. Prothiocona7ole provides control of diseases such as eyespot
(Pseudocercosporelia
herpotrichoides), Fusarium ear blight (Fusarium spp., Microdochium nivale),
leaf blotch
diseases (Septoria tritici, Leptosphaeria nodorurn, Pyrenophora spp.,
Rhynchosporium
secalis, etc.), rust (Puccinia spp.) and powdery mildew (Blumeria graminis),
by foliar
application, in wheat, barley and other crops.
[0010] In the compositions described herein, the weight ratios of the compound
of
Formula I at which the synergistic effects with the other fungicides are
observed lie within
the range of about 1:10 and 10:1.
[0011] In one embodiment, the weight ratio of the compound of Formula Ito the
other fungicides at which the fungicidal effect is synergistic lies within the
range of between
about 1:5 and about 5:1 and in another embodiment, the weight ratio lies
within the range of
between about 1:2 and about 1:1, and in still another embodiment, the weight
ratio lies within
the range of about 100:195 and about 130:195. In yet another embodiment, the
weight ratios
described herein are given for a compound of Formula I and other fungicides,
wherein
prothioconazole is representative of the other fungicides.
1100121 In the compositions described herein, the weight ratio of the compound
of
Formula I at which the improved plant physiology is synergistic, wherein
improved plant
physiology is characterized by at least one of the effects selected from the
group consisting of
enhanced root growth, improved greening, improved water use and efficiency,
improved
nitrogen use efficiency, delayed senescence, and enhanced yield, to the other
fungicides lies
within the range of about 1:10 and about 10:1.
[00131 In one embodiment, the weight ratio of the compound of Formula Ito the
other fungicides at which the improved plant physiology effect is synergistic,
wherein the
improved plant physiology effect is enhanced yield, lies within the range of
about 1:5 and
about 5:1 and in another embodiment, the weight ratio of the compound of
Formula I at
which the synergistic yield enhancement is observed with the other fungicides
lies within the
range of about 1:2 and about 1:1. In one embodiment, the weight ratio of the
compound of
Formula Ito the other fungicides at which the improved plant physiology effect
is
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synergistic, wherein the improved plant physiology effect is characterized by
increased
greening of plant tissue, lies within the range of about 1:5 and about 5:1 and
in another
embodiment, the weight ratio of the compound of Formula I at which the
greening effect is
observed with the other fungicides lies within the range of about 1:2 and
about 1:1. In yet
another embodiment, the weight ratios described herein are given for a
compound of Formula
and other fungicides, wherein prothioconazole is representative of the other
fungicides.
[0014] The rate at which the synergistic composition is applied will depend
upon the
particular type of fungus to be controlled, the degree of control required and
the timing and
method of application. In general, the composition of the disclosure can be
applied at an
application rate of between about 25 grams per hectare (a/ha) and about 850
g/ha based on
the total amount of active ingredients in the composition.
[0015] The synergistic composition comprising the compound of Formula I and
prothioconazole is applied at a rate between about 60 g/ha and about 600 g/ha.
Prothioconazole is applied at a rate between about 25 g/ha and about 300 g/ha
and the
compound of Formula I is applied at a rate between about 35 g/ha and about 300
g/ha. In a
more particular embodiment, prothioconazole is applied at a rate between about
100 g/ha and
200 g/ha, even more particularly about 195 g/ha, and the compound of Formula 1
is applied
at a rate between about 75 g/ha and 150 g/ha, even more particularly between
about 100 g/ha
and 130 g/ha.
[0016] The components of the synergistic mixture of the present disclosure can
be
applied either separately or as part of a multipart fungicidal system.
[0017] The synergistic mixture of the present disclosure can be applied in
conjunction
with one or more other fungicides to control a wider variety of undesirable
diseases. When
used in conjunction with other fungicide(s), the presently claimed compounds
may be
formulated with the other fungicide(s), tank mixed with the other fungicide(s)
or applied
sequentially with the other fungicide(s). Such other fungicides may include 2-
(thiocyanatomethylthio)-benzothiazole. 2-phenylphenol, 8-hydroxyquinoline
sulfate,
ametoctradin, amisulbrom, antimycin, Ampelomyces quisqualis, azaconazole,
azoxystrobin,
Bacillus subtilis, Bacillus subtilis strain QST713, benalaxyl, benomyl,
benthiavalicarb-
isopropyl, benzylaminobenzene-sulfonate (BABS) salt, bicarbonates, biphenyl,
bismerthiazol, bitertanol, hi xafen, blasticidin-S, borax, Bordeaux mixture,
boscalid,
bromuconazole, bupirimate, calcium polysulfide, captafol, captan, carbendazim,
carboxin,
carpropamid, carvone, chlazafenone, chloroneb, chlorothalonil, chlozolinate,
Coniothyrium
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minitans, copper hydroxide, copper octanoate, copper oxychloride, copper
sulfate, copper
sulfate (tribasic), cuprous oxide, cyazofamid, cyflufenamid, cymoxanil,
cyproconazole,
dazomet, debacarb, diammonium ethylenebis-(dithiocarbamate), dichlofluanid,
dichlorophen, diclocymet, diclomezine, dichloran, diethofencarb,
difenoconazole,
difenzoquat ion, diflumetorim, dimethomorph, dimoxystrobin, di niconazole,
diniconazole-M,
dinobuton, dinocap, diphenylamine, dithianon, dodemorph, dodcmorph acetate,
dodine,
dodine free base, edifenphos, enestrobin, enestroburin, epoxiconazole,
ethaboxam,
ethoxyquin, etridiazole, famoxadone, fenamidone, fenarimol, fenbuconazole,
fenfuram,
fenhexamid, fenoxanil, fenpiclonil, fenpropidin, fenpropimorph, fenpyrazamine,
fentin, fentin
acetate, fentin hydroxide, ferbam, ferimzone, fluazinam, fludioxonil,
flumorph, fluopicolide,
fluopyram, fluoroimide, fluoxastrobin, fluquinconazole, flusilazole,
flusulfamide, flutianil,
flutolanil, flutriafol, fluxapyroxad, folpet, formaldehyde, fosetyl, fosetyl-
aluminium,
fuberidazole, furalaxyl, furametpyr, guazatine, guazatine acetates, GY-81,
hexachlorobenzene, hexaconazole, hymexazol, imazalil, imazalil sulfate,
imibenconazole,
iminoctadine, iminoctadine triacetate, iminoctadine tris(albesilate),
iodocarb, ipconazole,
ipfenpyrazolone, iprobenfos, iprodione, iprovalicarb, isoprothiolane,
isopyrazam, isotianil,
kasugamycin, kasugamycin hydrochloride hydrate, laesoxim-methyl, laminarin,
mancopper,
rnancozeb, mandipropamid, maneb, mefenoxam, mepanipyrim, mepmnil, meptyl-
dinocap,
mercuric chloride, mercuric oxide, mercurous chloride, metalaxyl, metalaxyl-M,
metam,
metam-ammonium, metam-potassium, metam-sodium, metconazole, methasulfocarb,
methyl
iodide, methyl isothiocyanate, metiram, metominostrobin, metrafenone,
mildiomycin,
myclobutanil, nabam, nitmthal-isopropyl, nuarimol, octhilinone, ofurace, oleic
acid (fatty
acids), orysastrobin, oxadixyl, oxine-copper, oxpoconazole fumarate,
oxycarboxin,
pefurazoate, penconazole, pencycuron, penflufen, pentachlorophenol,
pentachlorophenyl
laurate, penthiopyrad, phenylmercury acetate, phosphonic acid, phthalide,
picoxystrobin,
polyoxin B, polyoxins, polyoxorim, potassium bicarbonate, potassium
hydroxyquinoline
sulfate, probenazole, prochloraz, procymidone, propamocarb, propamocarb
hydrochloride,
propiconazole, propincb, proquinazid, prothioconazolc, pyraclostrobin,
pyrametostrobin,
pyraoxystrobin, pyrazophos, pyribencarb, pyributicarb, pyrifenox,
pyrimethanil, pyriofenone,
pyroquilon, quinoclamine, quinoxyfen, quintozene, Reynoutria sachalinensis
extract,
sedaxane, silthiofam, simeconazole, sodium 2-phenylphenoxide, sodium
bicarbonate, sodium
pentachlorophenoxide, spiroxamine, sulfur, SYP-Z048, tar oils, tebuconazole,
tebufloquin,
tecnazene, tetraconazole, thiabendazole, thifluzamide, thiophanate-methyl,
thiram, tiadinil,
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tolclofos-methyl, tolylfluanid, triadimefon, triadimenol, triazoxide,
tricyclazole, tridemorph,
trifloxystrobin, triflumizole, triforine, triticonazole, validamycin,
valifenalate, valiphenal,
vinclozolin, zineb, ziram, zoxamide, Candida oleophila, Fusarium oxysporum,
Gliocladium
spp., Phlebiopsis gigantea, Streptomyces griseoviridis, Trichoderma spp., (RS)-
N-(3.5-
dichloropheny1)-2-(methoxymethyl)-succinimide, 1,2-dichloropropane, 1,3-
dichloro-1,1,3,3-
tetrafluoroacetone hydrate, 1-chloro-2,4-dinitronaphthalene, 1-chloro-2-
nitropropanc, 2-(2-
heptadecy1-2-imidazolin-1-y1)ethanol, 2,3-dihydro-5-pheny1-1,4-dithi-ine
1,1,4,4-tetraoxide,
2-methoxyethylmercury acetate, 2-methoxyethylmercury chloride, 2-
inethoxyethylniercury
silicate, 3-(4-chloropheny1)-5-methylrhodanine, 4-(2-nitroprop-1-enyl)phenyl
thiocyanateme,
ampropylfos, anilazine, azithiram, barium polysulfide, Bayer 32394, benodanil,
benquinox,
bentaluron, benzamacril; benzamacril-isobutyl, benzamorf, binapacryl,
bis(methylmercury)
sulfate, bis(tributyltin) oxide, buthiobate, cadmium calcium copper zinc
chromate sulfate,
carbamorph, CECA, chlobenthiazone, chloraniformethan, chlorfenazole,
chlorquinox,
climbazole, copper bis(3-phenylsalicylate), copper zinc chromate, cufraneb,
cupric
hydrazinium sulfate, cuprobam, cyclafuramid, cypendazole, cyprofuram,
decafentin,
dichlone, dichlozoline, diclobutrazol, dimethirimol, dinocton, dinosulfon,
dinoterbon,
dipyrithione, ditalimfos, dodicin, drazoxolon, EBP, ESBP, etaconazole, etem,
ethiritn,
fenaminosulf, fenapanil, fenitropan, nuotrimazole, furcarbanil, furconazole,
furconazole-cis,
furmecyclox, furophanate, glyodinc, griseofulvin, halacrinate, Hercules 3944,
hexylthiofos,
ICIA0858, isopamphos, isovaledione, mebenil, mecarbinzid, metazoxolon,
methfuroxam,
methylmercury dicyandiamide, metsulfovax, milneb, mucochloric anhydride,
myclozolin, N-
3,5-dichlorophenyl-succinimide, N-3-nitrophenylitaconimide, natamycin, N-
ethylmercurio-4-
toluenesulfonanilide, nickel bis(dimethyldithiocarbamate), OCII, phenylmercury
dimethyldithiocarbamate, phenylmercury nitrate, phosdiphen, prothiocarb;
prothiocarb
hydrochloride, pyracarbolid, pyridinitril, pyroxychlor, pyroxyfur, quinacetol;
quinacetol
sulfate, quinazamid, quinconazole, rabenzazole, salicylanilide, SSF-109,
sultropen, tecoram,
thiadifluor, thicyofen, thiochlorfenphim, thiophanate, thioquinox, tioxymid,
triamiphos,
triazbutil, trichlamide, urbacid, zarilamid, and any combinations thereof.
[0018] The compositions of the present disclosure are preferably applied in
the fomi
of a formulation comprising a composition of (a) a compound of Formula I and
(b) at least
one ergosterol biosynthesis-inhibitor fungicide selected from the group
consisting of
prothioconazole, epoxiconazole, cyproconazolc, myclobutanil, prochloraz,
metconazole,
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difenconazole, tebuconazole, tetraconazole, fenbuconazole, propiconazole,
tluquinconazole,
flusilazole, flutriafol, and fenpropimorph, together with a phytologically
acceptable carrier.
10019] Concentrated formulations can be dispersed in water, or another liquid,
for
application, or formulations can be dust-like or granular, which can then be
applied without
further treatment. The formulations are prepared according to procedures which
are
conventional in the agricultural chemical art, but which arc novel and
important because of
the presence therein of a synergistic composition.
[0020] The formulations that are applied most often are aqueous suspensions or
emulsions. Either such water-soluble, water-suspendable, or emulsifiable
formulations are
solids, usually known as wettable powders, or liquids, usually known as
emulsifiable
concentrates, aqueous suspensions, or suspension concentrates. The present
disclosure
contemplates all vehicles by which the synergistic compositions can be
formulated for
delivery and use as a fungicide.
[0021] As will be readily appreciated, any material to which these synergistic
compositions can be added may be used, provided they yield the desired utility
without
significant interference with the activity of these synergistic compositions
as antifungal
agents.
[0022] Wettable powders, which may be compacted to form water-dispersible
granules, comprise an intimate mixture of the synergistic composition, a
carrier and
agriculturally acceptable surfactants. The concentration of the synergistic
composition in the
wettable powder is usually from about 10% to about 90% by weight, more
preferably about
25% to about 75% by weight, based on the total weight of the formulation. In
the preparation
of wettable powder formulations, the synergistic composition can be compounded
with any
of the finely divided solids, such as prophyllite, talc, chalk, gypsum,
Fuller's earth, bentonite,
attapulgite, starch, casein, gluten, montmorillonite clays, diatomaceous
earths, purified
silicates or the like. In such operations, the finely divided carrier is
ground or mixed with the
synergistic composition in a volatile organic solvent. Effective surfactants,
comprising from
about 0.5% to about 10% by weight of the wettable powder, include sulfonated
lignins,
naphthalenesulfonates, alkylbenzenesulfonates, alkyl sulfates, and non-ionic
surfactants, such
as ethylene oxide adducts of alkyl phenols.
[0023] Emulsifiable concentrates of the synergistic composition comprise a
convenient concentration, such as from about 10% to about 50% by weight, in a
suitable
liquid, based on the total weight of the emulsifiable concentrate formulation.
The components
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of the synergistic compositions, jointly or separately, are dissolved in a
carrier, which is
either a water-miscible solvent or a mixture of water-immiscible organic
solvents, and
emulsifiers. The concentrates may be diluted with water and oil to form spray
mixtures in the
form of oil-in-water emulsions. Useful organic solvents include aromatics,
especially the
high-boiling naphthalenic and olefinic portions of petroleum such as heavy
aromatic naphtha.
Other organic solvents may also be used, such as, for example, terpenic
solvents, including
rosin derivatives, aliphatic ketones, such as cyclohexanone, and complex
alcohols, such as 2-
ethoxyethanol.
[0024] Emulsifiers which can be advantageously employed herein can be readily
determined by those skilled in the art and include various nonionic, anionic,
cationic and
amphoteric emulsifiers, or a blend of two or more emulsifiers. Examples of
nonionic
emulsifiers useful in preparing the emulsifiable concentrates include the
polyalkylene glycol
ethers and condensation products of alkyl and aryl phenols, aliphatic
alcohols, aliphatic
amines or fatty acids with ethylene oxide, propylene oxides such as the
ethoxylated alkyl
phenols and carboxylic esters solubilized with the polyol or polyoxyalkylene.
Cationic
emulsifiers include quaternary ammonium compounds and fatty amine salts.
Anionic
emulsifiers include the oil-soluble salts (e.g., calcium) of alkylaryl
sulfonic acids, oil-soluble
salts or sulfated polyglycol ethers and appropriate salts of phosphated
polyglycol ether.
[0025] Representative organic liquids which can be employed in preparing the
emulsifiable concentrates of the present disclosure are the aromatic liquids
such as xylene,
propyl benzene fractions, or mixed naphthalene fractions, mineral oils,
substituted aromatic
organic liquids such as dioctyl phthalate, kerosene, dialkyl amides of various
fatty acids,
particularly the dimethyl amides of fatty glycols and glycol derivatives such
as the n-butyl
ether, ethyl ether or methyl ether of diethylene glycol, and the methyl ether
of triethylene
glycol. Mixtures of two or more organic liquids are also often suitably
employed in the
preparation of the emulsifiable concentrate. The preferred organic liquids are
xylene, and
propyl benzene fractions, with xylene being most preferred. The surface-active
dispersing
agents are usually employed in liquid formulations and in the amount of from
0.1 to 20
percent by weight of the combined weight of the dispersing agent with the
synergistic
compositions. The formulations can also contain other compatible additives,
for example,
plant growth regulators and other biologically active compounds used in
agriculture.
[0026] Aqueous suspensions comprise suspensions of one or more water-insoluble
compounds, dispersed in an aqueous vehicle at a concentration in the range
from about 5% to
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about 70% by weight, based on the total weight of the aqueous suspension
formulation.
Suspensions are prepared by finely grinding the components of the synergistic
combination
either together or separately, and vigorously mixing the ground material into
a vehicle
comprised of water and surfactants chosen from the same types discussed above.
Other
ingredients, such as inorganic salts and synthetic or natural gums, may also
be added to
increase the density and viscosity of the aqueous vehicle. It is often most
effective to grind
and mix at the same time by preparing the aqueous mixture and homogenizing it
in an
implement such as a sand mill, ball mill, or piston-type homogenizer.
[0027] The synergistic composition may also be applied as a granular
formulation,
which is particularly useful for applications to the soil. Granular
formulations usually contain
from about 0.5% to about 10% by weight of the compounds, based on the total
weight of the
granular formulation, dispersed in a carrier which consists entirely or in
large part of coarsely
divided attapulgite, bentonite, diatomite, clay or a similar inexpensive
substance. Such
formulations are usually prepared by dissolving the synergistic composition in
a suitable
solvent and applying it to a granular carrier which has been preformed to the
appropriate
particle size, in the range of from about 0.5 to about 3 mm. Such formulations
may also be
prepared by making a dough or paste of the carrier and the synergistic
composition, and
crushing and drying to obtain the desired granular particle.
[0028] Dusts containing the synergistic composition are prepared simply by
intimately mixing the synergistic composition in powdered form with a suitable
dusty
agricultural carrier, such as, for example, kaolin clay, ground volcanic rock,
and the like.
Dusts can suitably contain from about 1% to about 10% by weight of the
synergistic
composition/carrier combination.
[0029] The formulations may contain agriculturally acceptable adjuvant
surfactants to
enhance deposition, wetting and penetration of the synergistic composition
onto the target
crop and organism. These adjuvant surfactants may optionally be employed as a
component
of the formulation or as a tank mix. The amount of adjuvant surfactant will
vary from 0.01
percent to 1.0 percent volume/volume (v/v) based on a spray-volume of water,
preferably
0.05 to 0.5 percent. Suitable adjuvant surfactants include ethoxylated nonyl
phenols,
ethoxylated synthetic or natural alcohols, salts of the esters or
sulfosuccinic acids,
ethoxylated organosilicones, ethoxylated fatty amines and blends of
surfactants with mineral
or vegetable oils.
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[0030] The formulations may optionally include combinations that can comprise
at
least 1% by weight of one or more of the synergistic compositions with another
pesticidal
compound. Such additional pesticidal compounds may be fungicides,
insecticides,
nematocides, tniticides, arthropodicides, bactericides or combinations thereof
that are
compatible with the synergistic compositions of the present disclosure in the
medium selected
for application, and not antagonistic to the activity of the present
compounds. Accordingly, in
such embodiments the other pesticidal compound is employed as a supplemental
toxicant for
the same or for a different pesticidal use. The pesticidal compound and the
synergistic
composition can generally be mixed together in a weight ratio of from 1:100 to
100:1.
[0031] The present disclosure includes within its scope methods for the
control or
prevention of fungal attack and methods for providing improved plant
physiology, wherein
improved plant physiology is characterized by at least one of the effects
selected from the
group consisting of enhanced root growth, improved greening, improved water
use and
eticiency, improved nitrogen use efficiency, delayed senescence, and enhanced
yield. These
methods comprise applying to the locus of the fungus, or to a locus in which
the infestation is
to be prevented (for example applying to wheat or barley plants), a
fungicidally effective
amount of the synergistic composition. The synergistic composition is suitable
for treatment
of various plants at fungicidal levels, while exhibiting low phytotoxicity.
The synergistic
composition is useful in a protectant or eradicant fashion. The synergistic
composition is
applied by any of a variety of known techniques, either as the synergistic
composition or as a
formulation comprising the synergistic composition. For example, the
synergistic
compositions may he applied to the roots, seeds or foliage of plants for the
control of various
fungi, without damaging the commercial value of the plants. The synergistic
composition is
applied in the form of any of the generally used formulation types, for
example, as solutions,
dusts, wettable powders, flowable concentrates, or emulsifiable concentrates.
These materials
are conveniently applied in various known fashions.
[0032] The synergistic composition has been found to have significant
fungicidal
effect, particularly for agricultural use. Additionally, the synergistic
composition has been
found to promote improved plant physiology, wherein improved plant physiology
is
characterized by improved greening and enhanced yield. The synergistic
composition is
particularly effective for use with agricultural crops and horticultural
plants, or with wood,
paint, leather or carpet backing.
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[0033] In particular, the synergistic composition is effective in controlling
a variety of
undesirable fungi that infect useful plant crops. The synergistic composition
may be used
against a variety of Ascomycete and Basidiomycete fungi, including for example
the
following representative fungi species: wheat brown rust (Puccini(' recondita;
Bayer code
PUCCRT); stripe rust of wheat (Puccinia striiformis; Bayer code PUCCST); leaf
blotch of
wheat (Mycosphaerella graminicola; anamorph: S'eptoria tritici; Bayer code
SEVEIR);
alume blotch of wheat (Leptosphaeria nodorum; Bayer code LEPTNO; anamorph:
Stagonospora nodorum); leaf blotch of barley (Rhynchosporium secalis; Bayer
code
RHYNSE), spot blotch of barley (Cochliobolu,s sativum; Bayer code COCHSA;
anamorph:
Helminthosporium sativum); leaf spot of sugar beets (Cercospora beticola;
Bayer code
CERCBE); leaf spot of peanut (Mycosphaerella arachidis; Bayer code MYCOAR;
anamorph: Cercospora arachidicola); cucumber anthracnose (Glomerella
lagenarium;
anamorph: Colletotrichum lagenarium; Bayer code COLLLA). It will be understood
by those
in the art that the efficacy of the synergistic compositions for one or more
of the foregoing
fungi establishes the general utility of the synergistic compositions as
fungicides.
[0034] The synergistic compositions have a broad range of efficacy as a
fungicide.
The exact amount of the synergistic composition to be applied is dependent not
only on the
relative amounts of the components, but also on the particular action desired,
the fungal
species to be controlled, and the stage of growth thereof, as well as the part
of the plant or
other product to be contacted with the synergistic composition. Thus,
formulations containing
the synergistic composition may not be equally effective at similar
concentrations or against
the same fungal species.
10035] The synergistic compositions are effective in use with plants in a
disease-
inhibiting and phytologically acceptable amount. The term "disease-inhibiting
and
phytologically acceptable amount" refers to an amount of the synergistic
composition that
kills or inhibits the plant disease for which control is desired, but is not
significantly toxic to
the plant. The exact concentration of synergistic composition required varies
with the fungal
disease to be controlled, the type of formulation employed, the method of
application, the
particular plant species, climate conditions, and the like.
[0036] The present compositions can be applied to fungi or their locus by the
use of
conventional ground sprayers, granule applicators, and by other conventional
means known
to those skilled in the art.
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[0037] The following examples are provided to further illustrate the
disclosure. They
are not meant to be construed as limiting the disclosure.
Examples
[0038] Evaluation of Improved Plant Physiology Including Yield Enhancement and
Improved Greening of Fungicide Mixtures vs. Leaf Blotch of Barley
(Rhynchosporium
secalis; Bayer code RHYNSE):
[0039] The results in Tables 1 ¨ 3 were generated using foliar applied
applications in
small plot (2.5 x 8.0 meters (m)) research experiments to evaluate the
compositions in winter
barley (Hordeum vulgare, HORVW). Two treatments were applied at crop stages
BBCH 31
and 43 ¨ 49, respectively. Applications were made using a backpack sprayer
(2500a)
equipped with a 2.5 m spray boom fitted with 5 Agrotop-AM11002 flat fan
nozzles spaced at
50 centimeters (cm) oriented at 90 degrees. The output volume of the
compositions, diluted in
water, was 200 liters per hectare (L/ha). Visual assessments for the control
of leaf blotch of
barley (Rhynchosporium secalis, RHYNSE) were reported as percent (%) infected
leaf area
and were conducted at the time of application 1 (untreated check at BBCH 31),
at the time of
application 2 (BBCH 43 ¨ 49), and at 2 ¨ 4 weeks after application 2. Improved
plant health
was measured through the visual assessment of % green leaf area 6 weeks after
application 2
at growth stage BBCH 75 ¨ 77. The values reported are means from 4 replicates
and
statistical differences were determined using Duncan's New MRT (P = 0.5).
[0040] Colby's equation was used to determine the fungicidal effects expected
from
the mixtures. (See Colby, S. R. Calculation of the synergistic and
antagonistic response of
herbicide combinations. Weeds 1967, 15, 20¨ 22.)
[00411 The following equation was used to calculate the expected activity of
mixtures
containing two active ingredients, A and B:
Expected = A + B ¨ (A x B/100)
A = observed efficacy of active component A at the same concentration as
used in the mixture;
B = observed efficacy of active component B at the same concentration as
used in the mixture.
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[0042] The ability of the compositions described herein to afford suitable
disease
control is illustrated by the efficacy data in Table 1 and representative
synergistic interactions
of the compositions with regard to increased yield and improved plant health
are presented in
Tables 2 - 3, respectively.
Table 1. Biological Activity Observed with Synergistic Mixtures of Compounds
of Formula I
and Prothioconazole in Applications on Winter Barley (Hordeum vulgare, IIORVW)
to
Control Leaf Blotch of Barley (Rhynchosporiwn secalls; Bayer code RHYNSE).
% Reduction
Rates Visible
Composition of Visible
(g ai/ha)* Lesions
Lesions*
Cmpd. I + Prothioconazole 0.0 + 195.0 1.2 85.7
Cmpd. I + Prothioconazole 100.0 + 195.0 1.7 79.8
Cmpd. I + Prothioconazole 130.0 + 195.0 1.5 82.1
Cmpd. I + Prothioconazole 100.0 + 0.0 2.9 65.4
Cmpd. I + Prothioconazole 130.0 + 0.0 2.7 67.8
Cmpd. I + Prothioconazole 0.0 + 0.0 8.4
g ai/h = grams active ingredient / hectare.
*% Reduction of Visible Lesions = (Visible Lesions on the Untreated - Visible
Lesions on
the Treated) / Visible Lesions on the Untreated x 100.
Table 2. Yield Improvement Observed with Synergistic Mixtures of Compounds of
Formula I
and Prothioconazole in Applications on Winter Barley (Hordeum vu/gore, HORVW)
to
Control Leaf Blotch of Barley (Rhynchosporium secalis; Bayer code RHYNSE).
Increase in Yield Ratio
of
Rates Treated: Untreated* Synergy
Composition
(g ai/ha) (Raw Yield Data)* Factor
Observed Expected
Cmpd. I + Prothioconazole 0.0 + 195.0
(5.77)
13.2%
Cmpd. + Prothioconazole 100.0 + 195.0 8.5%
1.55
15.7%
Cmpd. I + Prothioconazole 130.0 + 195.0 11.2% 1.40
Cmpd. I + Prothioconazole 100.0 + 0.0
(5.33)
3.2%
Cmpd. I + Prothioconazole 130.0 + 0.0
(5.49)
100%
Untreated
(5.32)
ai/h = grams active ingredient / hectare.
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9% Increase in Yield Ratio of Treated: Untreated* = (Observed Yield /
Untretaed Yield) x
100 ¨ 100.
*Synergy Factor = Observed % Yield Increase / Expected % Yield Increase.
*Observed Raw Yield Data Is Measured in Metric Tons / Hectare (t/ha).
Table 3. Plant Cireening Improvements Observed with Synergistic Mixtures of
Compounds of
Formula I and Prothioconazole in Applications on Winter Barley (Hordeum
vulgare,
HORVW) to Control Leaf Blotch of Barley (Rhynchosporium secalis; Bayer code
RHYNSE).
Increase in
% Green Leaftop Ratio
Rates of Treated : Untreated* Synergy
Composition
(g ai/ha)* (Raw %Green Leaftop) Factor
Observed Expected
Cmpd. I + Prothioconazole 0.0 + 195.0 1533%
(76%)
183.3% 153.3%
Cmpd. I + Prothioconazole 100.0 + 195.0 1.2
200% 142.6%
Cmpd. + Prothioconazole 130.0 + 195.0 1.4
(90%) (84.6%)
0%
Cmpd. 1 + Prothioconazole 100.0 + 0.0
(30%)
20%
Cmpd. I + Prothioconazole 130.0 + 0.0
(36%)
100%
Untreated
(30%)
g ai/h = grams active ingredient / hectare.
9% Increase in % Green Leaftop Ratio of Treated : Untreated = (Observed %
Green Leaftop /
Untreated % Green Leaftop) x 100 ¨ 100.
*Synergy Factor = Observed % Green Leaftop / Expected % Green Leaftop.
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